Statistics of a Passive Scalar in a 2D Shear Flow with Fluctuations

被引：1

作者：

Ivchenko, N. A. ^{[1
]}

Vergeles, S. S. ^{[2
]}

机构：

[1] Russian Acad Sci, Landau Inst Theoret Phys, Chernogolovka 142432, Moscow Oblast, Russia

[2] Natl Res Ctr Higher Sch Econ, Moscow 111250, Russia

来源：

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2023年 / 136卷 / 05期

关键词：

POLYMER DYNAMICS; TEMPERATURE; TURBULENCE; SPECTRUM; FLUID; DECAY;

D O I：

10.1134/S1063776123050096

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study statistical properties of the passive scalar advection in a 2D flow that consist of a steady-state shear flow and a relatively weak smooth random component taking into account the effects of finite weak diffusion. The model is closely related to the dynamics of passive scalar transfer inside coherent vortices emerging as a result of an inverse cascade in 2D turbulence. We analyze both the decay of the passive scalar and the problem with continuous supply of the scalar to the system. In both cases, the passive scalar distribution exhibits strong intermittence, which can be indicated with single-point moments calculated in this study.

引用

页码：644 / 652

页数：9

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